In at least 500 words, answer the following question: Choose one historical even

In at least 500 words, answer the following question:
Choose one historical event from the 20th Century How has that event had the most impact in changing the course of human development?
How has it impacted your view toward society and the world around you?
Note: the 20th century covers the years from 1900-1999.
HELPFUL HINTS:
Human evolution grew exponentially during the 20th century. We went from pens and paper to personal computers, from traveling by horses to flying in rockets, and from parlor music to rock-in-roll and rap. For your last paper, select ONE major event that occurred from 1900-1999 and discuss its impact on our society, AND how it has impacted YOUR personal point-of-view.